Please check the troubleshooting guides before posting!

[DonutRush]

If you haven't already: Make sure that drivers are up to date too.

Also, try adaptive sync and see how that works.

Drivers are up to date, AMD only releases them every couple of months anyway. Adaptive sync acts like I turned vsync off entirely, tearing everywhere and crap framerate. I've played with all of the settings ingame and nothing noticeably impacts performance in either direction.